Need guideline for send ETC coin using web3js,As per documented flow I understand we can access all methods same as ETH but I have query regarding set provider for ETC after that I can connect to ETC ...

I want to migrate my no-SQL dB on-chain. There are two options as far as I know:
Store the objects in the form of string using a simple smart contract.
Create a structure to implement the dB schema. ...

Are the timestamps of blocks for Ethereum only accepted when they are monotonically increasing? If yes, why? And why other blockchains like Bitcoin and other blockchains with shorter block time can ...

i'm studying blockchain development, and i'm trying to create wallet with seed words using eth-lightwallet and vuejs. But i receive this error: Keystore: Must include seedPhrase in createVault inputs, ...

I have two seperately running private ethereum networks,i want to copy the data from the first private network to the second one without stopping.I have tried multiple ways but was not successful.I ...

I am trying to develop a Dapp with nodejs backend but I cannot get accounts from Metamask which resides on my frontend.
I tried to create an endpoint for each function in Smart Contract. And it seems ...

Since all data on the Blockchain is public. Presume I have multiple users submitting data which I want to hide, is there a way I can encrypt that data on the Blockchain ?
Or do I have to encrypt off-...

I'm using a html code connected to my smart contract via testrpc node, where users submit temperature data.
How can I view that data from the smart contract, each time I view from the contract I see ...

So dApps are frontend + contract. Users interact with smart contracts via frontend. Do users i.e. people should be aware of how the contract is designed while using any dApp? are their any risks of ...

My ethereum has been confirmed delivered but not in my wallet,fairly new but I have made successful transactions before,I can see my ethereum in etherscan.io 0x2ecc74c6e9c42eea14863fbc1e1d9656b339a6ec ...

I'm using a testrpc to test my sensor contract, where many account get to submit data to the block-chain whether using an html client side application or using the smart contract is self.
How can I ...

I dont know if question is asked before but I did not find any.
I am facing this issue since yesterday.
I am able to get balance and txnHash but it never shows on etherScan.io , nor it gives me txn. ...

I started to sync Ethereum using command geth --syncmode "fast" on my windows system. It was taking so much time so i have stopped sync and used the following command.
geth --syncmode "fast" --cache=...

I am trying to host DApp "pet-shop" which one of the truffle boxes on IPFS. rsyncing of src, build/contracts and ipfs add files went very well and there are plenty of peers as seeders on the network ...

I'm trying to get time once data is submitted off-chain, since only way to get on-chain is via now to get the block time.
Off-chain I'm using "document.getElementById("demo").innerHTML = Date()" to ...

when a user sends a tarnsaction to define the access control of a resource to a device s1,then it will be executed by smart contract and the result of the transaction is stored in the storage file of ...

Can anyone please explain the process of Token migration from one network to another network, Like omesi go and tron has done. they first lauch there own ERC20 token over ethereum and later migrated ...

May any one give example how merkle tree is used in blockchain to verify the transaction? I confused because validation of data in ethereum is done through the proof of work where you find the nonce(...

I have problem with parity, cant get synchronization in archive mode to end,
anything, changing arguments, max-, min-, snapshot-peers, parity verisions do not help.
I have blockchain in archive mode ...

I have a smart contract that contains a function to store data onto the blockchain. The function stores two integer variables to the blockchain. Now, I can manually store the values from the remix-ide ...

I am trying to use an ethereum blockchain in a multiagent network. I would like to control when information is exchanged between nodes to keep the network synchronous, so I am trying to figure out how ...

I'm trying to create a DAPP (with docker-compose) which will require many transactions, and I am currently experiencing nonce problems with my Transaction Manager.
However, I'm not looking for help ...

I am working on a University Management System and I want to develop the system using Centralized Database like Mysql and to keep the data safe I want to use blockchain to store the hash of the data ...

I am working on a project in solidity where i am encode a string to SHA256 hash value, and now i want to decode SHA256 hash value and retrieve the actual data. please help hoe to do it.
Below is the ...

I have a simple smart contract running over a local Ethereum node. It has two functions: one for sending data and another for retrieving it back. I have a text file and want to send data from it to ...